acpi hangs system on reboot

This is on a dual celeron abit bp6 mobo.
Before jhb's fixup of the 0228 acpi code
the system was able to reboot just fine,
now (and also before the 0228 import)
it just hangs at:

# reboot
...
syncing disks, buffers remaining... 10 10 4 4
done
Uptime: 18h25m5s
Terminate ACPI

Any ideas?

Regards
Pawel